The pair dated back in 2011 before hit maker Cal and Rita Ora hooked up, and it seems they are still really good friends.

We hope Rita isn’t the jealous type, because her boyfriend was unable to make it to her celebrations this weekend, after she landed at number one in the UK charts.

Potentially awkward.

Here we look at some celebs who dealt with their exes a little differently. From admirable uncoupling to lawsuits and Twitter rows, it's a bumpy ride...

ENEMIES! Katie Price and Peter Andre

Not the best of friends (Photo: Dave Hogan/Getty Images)

They may have split five years ago but the fight is less than over between Katie and Peter. They fell in love infront of TV cameras on I'm A Celebrity, Katie and Peter Andre's rollercoaster relationship has been played out in reality shows, magazine deals and Twitter ever since.

FRIENDS! Chris Martin and Gwyneth Paltrow

Despite the split, they've been seen together quite often (Photo: Kevin Mazur/Getty Images)

A nod of appreciation goes to Chris Martin and Gwyneth Paltrow, who gave a bizarre statement citing “conscious uncoupling” for the reason they decided to divorce. And to add even more mystery they spent the few days after making the shock split announcement together on a romantic island.

ENEMIES! Kim Kardashian and Kris Humphries

The marriage lasted 72 days (Photo: Splash News)

After a measly 72-day marriage, Kim Kardashian and Kris Humphries got divorced. Unfortunately there was a legal battle which dragged on for so long it was only made official while Kim was pregnant with baby North, with new hubby Kanye West.

FRIENDS! Harry Styles and Taylor Swift

She knew he was trouble? (Photo: David Livingston/Getty Images))

It wasn’t the longest relationship in showbiz and it’s reported the otherwise lovely Taylor Swift penned break-up song I Knew You Were Trouble about Harry Styles. But they can’t exactly avoid each other with the amount of A-list music awards they attend – so it’s not surprising they’ve maintained a dignified friendship.

ENEMIES! Robert Kardashian and Rita Ora

Were they or weren't they?

It was thought Rita Ora and Rob Kardashian were dating for over a year after appearing to confirm their romance with a kissing selfie. But when Rob posted a string of tweets alleging Rita cheated on him with "20 dudes in less than a year" she hit back saying "I never thought it was actually a relationship".

FRIENDS! Liz Hurley and Hugh Grant

They dated for 12 years but remain close to this day (Photo: Daily Mirror)

From long-term lovers to lifetime friends, Liz Hurley and Hugh Grant spent 12 years together and have been close ever since. Liz controversially admitted to being closer to Hugh while engaged to Aussie cricketer Shane Warne. "It's hard for six months to compete with 20 years on a friendship level. I don't think either of us can imagine not having the other in our lives," she said of her ex.

FRIENDS! Simon Cowell and Sinitta

He’s so Macho with his silly unbuttoned shirts but it’s not put Sinitta off. This romance blossomed in the ‘80s and while Sinitta hints they’ve always enjoyed a “close” relationship things have changed since Cowell became a father for the first time. He’s settled with Lauren Silverman – the couple even made Sinitta the godmother of baby Eric.

ENEMIES! Lauren Goodger and Mark Wright

TOWIE's finest (Photo: Jorge Herrera/Getty Images)

They were the hottest couple in Essex but their long term relationship suffered as Mark Wright and Lauren Goodger balanced their privacy with fame. More recently, Mark - who is engaged to soap star Michelle Keegan - slammed Lauren for constantly talking about his new romance in interviews. He fumed: "Its been well over 2 years and it still continues. I find it so disrespectful to myself but more importantly, my fiancé. Be a proper woman. Please leave me out of your public conversations, stop embarrassing yourself. Start having some respect and MOVE ON."

FRIENDS! Orlando Bloom and Miranda Kerr

Is there a more genetically gifted couple? (Photo: Bruce Glikas/FilmMagic)

The ridiculously good looking couple of Miranda Kerr and Orlando Bloom were married for two years and have a son together. They made the mutual decision to split and use every interview opportunity to gush about the other. Which is nice, isn't it?